是否可以在Hsqldb独立模式下检查并随后修改现有架构?我尝试使用内置的管理工具查看该文件以及连接SQuirrel SQL Client。
我对各种表中存在的主键特别感兴趣。是否有相当于MySql的'show create table ...'或'describe'的命令?
答案 0 :(得分:5)
sqltool
\ d 命令近似于“describe”,主键信息存储在INFORMATION_SCHEMA
下:
sql> CREATE SCHEMA STACKOVERFLOW;
sql> SET SCHEMA STACKOVERFLOW;
sql> CREATE TABLE SO2406470 (pk1 INT NOT NULL, pk2 INT NOT NULL, data VARCHAR(64), PRIMARY KEY(pk1, pk2));
sql> \d SO2406470
name datatype width no-nulls
---- -------- ----- --------
PK1 INTEGER 11 *
PK2 INTEGER 11 *
DATA VARCHAR 64
sql> SELECT * FROM INFORMATION_SCHEMA.SYSTEM_PRIMARYKEYS WHERE TABLE_SCHEM = CURRENT_SCHEMA AND TABLE_NAME = 'SO2406470';
TABLE_CAT TABLE_SCHEM TABLE_NAME COLUMN_NAME KEY_SEQ PK_NAME
--------- ------------- ---------- ----------- ------- ------------
PUBLIC STACKOVERFLOW SO2406470 PK1 1 SYS_PK_10040
PUBLIC STACKOVERFLOW SO2406470 PK2 2 SYS_PK_10040
Fetched 2 rows
(HSQLDB-2.0.0rc9)
答案 1 :(得分:1)
sqltool \ dt 命令将显示所有表名, \ d?命令将显示所有'describe'选项。
sql> \dt
TABLE_SCHEM TABLE_NAME
----------- ---------------
PUBLIC APP_CFG
PUBLIC CFG_REFRESH_LOG
...
sql> \d?
\dX [parameter...] where X is one of the following.
a: list Aliases
c: list Catalogs
i: list Indexes (for some databases, must specify literal target table)
n: list schema Names
r: list Roles
s: list Sequences
S: list System tables
t: list Tables
u: list Users
v: list Views
*: list table-like objects
...